Speaker
Mr
Ábel Kálosi
(Charles University, Faculty of Mathematics and Physics, Department of Surface and Plasma Science)
Description
A stationary afterglow apparatus in conjunction with a laser absorption cavity ring-down spectrometer has been employed to observe absorption lines in the P- and R-branches of the $2v_1$ vibrational band of the $\mathrm{N_2H^+}$ molecular ion as a part of an ongoing experimental campaign whose goal is to study the electron-ion recombination of $\mathrm{N_2H^+}$ in afterglow plasmas. The probed absorption lines lie in the near-infrared spectral region around 1580 nm. The observed transition wavenumbers were fitted to experimental accuracy and improved molecular constants of the upper vibrational state were obtained. The experimental apparatus can been used to investigate translational and rotational temperatures of the ions in a wide range of experimental conditions. The employed cavity ring-down spectroscopy is also able to determine absolute ion number densities that are needed for recombination measurements.
Acknowledgement: This work is partly supported by Czech Science Foundation projects GACR 17-08803S, GACR 15-15077S, GACR 17-18067S, and by Charles University Grant Agency project GAUK 1583517.
Primary author
Mr
Ábel Kálosi
(Charles University, Faculty of Mathematics and Physics, Department of Surface and Plasma Science)
Co-authors
Mr
Dmytro Shapko
(Charles University, Faculty of Mathematics and Physics, Department of Surface and Plasma Science)
Prof.
Juraj Glosík
(Charles University, Faculty of Mathematics and Physics, Department of Surface and Plasma Science)
Dr
Petr Dohnal
(Charles University, Faculty of Mathematics and Physics, Department of Surface and Plasma Science)
Dr
Radek Plašil
(Charles University, Faculty of Mathematics and Physics, Department of Surface and Plasma Science)
